Machine for cutting sheets from webs of paper



(No Model.) 2 SheetsSheet 1.

J. A. DEAR. MACHINE FOR CUTTING SHEETS FROM WEBS OF PAPER. No. 452,025.Patented May 12, 1891.

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(No Model.) 2 Sheets-Sheet 2. I

J. A. DEAR. MACHINE FOR CUTTING SHEETS PROM WEBS OF PAPER. No. 452,025.Patented May 12, 1891.

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UNrTnn STATES PATENT.

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JOSEPH A. DEAR, OFJERSEY CITY, NEWV JERSEY.

SPECIFICATION forming part of Letters Patent No. 452,025, dated May 12,1891.

Application filed January 20, 1890- Scrial No. 337,418. (No model.)

To all whom, it may concern.-

Be it known that I, JOSEPH A. DEAR, of Jersey City, in the county ofHudson and State of New Jersey, have invented an Improvement in Machinesfor Cutting Sheets froma \Veb of Paper, of which the following is aspecification.

. This improvement is especially adapted to printing-presses in whichthe web of paper is fed into the press and which is cut off before beingprinted upon; but the cutting apparatus may be made use of forseparating sheets of paper from a' web independent of theprinting-press, or such cutting apparatus may be used in connection withfolding mechanmm.

In mechanism for cutting a web of paper into sheets the cutting-cylinderhas been made use of as a measure for the length of sheet, and in otherinstances the sheet has been fed independently of the cutters, and thecutter has been made to move at or about the same speed as the paper atthe time that it acts upon the sheet, and in other instances the sheethas been perforated and pulled apart on the line of the perforations byrollers or belts having an accelerated movement.

In the drawings, Figure 1 is a vertical section representing myimprovements. Fig. 2 is a diagrammatic plan view showing the gearing forconnecting-the press and the cutting mechanism, and Fig. 3 is a sectionin larger size of the cutting-cylinders.

The feed-rolls A and A are geared together with'their surfaces in closeproximity, so as to feed the paper along from the web X, and such paperpasses over the bridge B, of any suitable construction, and between thecutting-rolls C and C. The cutting-rolls O C are to be revolved anydesired number of revolutions to each revolution of the press, and thelength of the sheet fed in by the rollersAA can bevaried by changing thespeeds of such rolls AA. To effect this object the gearY upon the shaft2is changeable, and the gearZ is linked to the axis 3 of the feed-roll A,so that the gear Z can be changed in its position according to thediameter of the gear Y, and the shaft 2 may be driven by any suitablegearing. I have shown in Fig. 2 the bevel-gears at and 5 and thelongitudinal shaft 26, extending to the axis of the impression-cylinderG, so that same size, the cutter 8 will coincide with the slot 9 in 0'each revolution,-and it is to be observed that while the cutter 8 may beof any desired character the slot 9 is between two projecting ribs 10upon the surface of the cylinder O for a purpose hereinafter stated. Ifthe sheets to be cut correspond in length to the circumference of thecylinder 0 or less than such circumference, then the cuttingeyiinders OC will be geared to make one revolution for each sheet out, and I preferto drive these cutting-cylinders G C faster than the paper as it is fedalong by the rolls A A in order that the cut made in the paper may besharp'and rapid and that the advancing sheet may be free to be drawnalong by the belts leading to the impression-cylinder instead of suchsheet requiring an accelerated movement to pull apart the connectingfilament usually existing where the cutter perforates the papertransversely of the web without cutting the paper off sharp and clean.Under all circumstances it is to be observed that the surface of thecutting-cylinder C does not touch either the surface of the cylinder 0or of the ribs 10. Hence the paper is not nipped by the cylindersthemselves. If now the cutters are to be made use of in separatingsheets that are longer than the circumference of the cylinder O,thecylinders O O are made to revolve more than once for each, sheetseparated. This is effected by changing the relative sizes of the gears6 and 7, so that the slot 9 will coincide with the cutter 8 everysecond, third, or fourth revolution, and the cutter Will not beoperative in separating the sheet, except when the cutter 8 and slot 9coincide, because the line of movement of the paper is adjacent to thesurface of the cylinder 0 and the paper is lifted by the ribs 10 and thecutter touches but slightly, if at all, upon the web of paper in itsnormal position. For this reason the cutting operation Will only beperformed when the ribs 10 raise the sheet of paper and support it whilethe cutter passes down into the slot 9, and it will now be evident thatthe gearing Ycan'be changed so as to adapt the cutting-cylinders toseparate the paper one or more times each complete movement of thepress, and that it is not necessary to change the cutting-cylinders O Cthemselves, and the gears can be constructed and marked so as toindicate the size of sheet with which they are to be employed, thusadapting the entire press to newspaper, book, or job work by a simplechange of gearing, which is easily efiected, upon the outer ends of therespective shafts.

When the cutting-cylinders are approximately the. same size as. thegears 6 and 7 that connect them together, as seen by dotted bedded intothe slot 9v and remaining wedged 3 therein, and in addition to this theedge of the cutter is not liable toinjure the paper by contact therewithwhen the paper is not raised by the ribslO, because the paper rests uponthe surface of the cylinder 0 and out of the way of the edge of thecutter. I prefer to pass the sheet over the bridges B: and B and beneaththe bridges B, in between the lines of tapes 15 and 16 upon the pairs ofrolls D D D D and by the bridge B to the grippers 18 upon theimpressioncylinder G, and by placing the gear Z between the gear uponthe shaft of the impression-cylinder G and the gear upon the shaft ofthe roller D the tapes 15 16 will move at, the same, surface speed asthe impression-cylinder G, and the advancing end of the. sheet will passover the bridges'BB and in between the tapes 15 and 16 before thecutting operation takes place. Hence the sheet as separated will passalong to the impression-cylinder and be moved at the same speed as thegrippers, in order that such grippers may properly grasp the sheet andcarry it to the printing mechanism.

If desired, pulleys with pads thereon may be applied to either of therolls D D D D", as shown in my application, Serial No. 304,621, forpatent, filed March 27, 1889,. It will be understood that the gudgeonfor the gear Z should be on an adjustable arm 20, so that it may beproperly placed to gear with the gear Y upon the shaft 2 and the gear 6upon the shaft of the roll 0 and to allow these gears to be changed.

In placing the gears in their proper positions for communicating motionfrom the shaft 2 to the shaft of the cutter-cylinder 0 reference is tobe had to the position of the grippers l8 and the movements of theintervening parts so that the end of the sheet may reach the grippersproperly.

This improvement may be made use of for cutting paper in aprinting-press or in a folding-machine, but the mechanism by which .thecutter is adapted to a folding-machine is reserved for a separateapplication.

It will be apparent that the cutter made useot' may be of any desiredcharactersu ch, F for instance, as that shown in my patent No.414,299-and in some instances it. will be f preferable to remove one orboth of the cutting-cylinders and substitute others of differentdiameters in order that the diameters of :Ithe cutting-cylinders. maycorrespond to or approximate the size of the gears 6 and 7, as.

such gears may be changed to cause the cutter and slot to coincide everysecond or more revolutions of one or both of the cutting-cyl- 1 inders.C C.

It will be evident that one pair of cuttingcylinders and gears areadapted to cutting various lengths of sheets within a. certain range orlimit, and that by varying the gears or changing one or both cylindersthe appatus will be adapted to cutting various lengths of sheets withinanother range or limit, and so on. WVhere the gears that unite thecylinders O C are at one end of their shafts, as seen by dotted lines at30, Fig. 2, the gears Z and 6, that. drive the lower cutting-cylinder0", may be at the other end, as shown by full lines.

I claim as my invention 1;. The combination, with male and femalerevolving cutters, of gearing connecting the

